Fast-locking anti-loosening locking device

ABSTRACT

The present invention discloses a fast-locking anti-loosening locking device, comprising a body, a pull rod with threads, a pressing block and an eccentric handle, wherein the pressing block is disposed on one side of the body, the pull rod respectively penetrates through the pressing blocking and the body, and one end of the pull rod is movably connected to the eccentric handle and the other end of the pull rod penetrates through the body to thread-fit a cap nut; and a spacing between the pressing block and the body is adjusted by rotating the cap nut to adapt to guide rails of different sizes. The present application has the following advantages: even through in the case of firearm firing, the fast-locking anti-loosening locking device can still maintain a locked state instead of loosening, thereby ensuring the reliability and practicality of the mechanism.

TECHNICAL FIELD

The present invention relates to a fast-locking anti-loosening lockingdevice.

BACKGROUND OF THE PRESENT INVENTION

When in use of firearms, the sighting telescope, bracket, butt or otheraccessories are usually locked on the guide rails of firearms by alocking device having an eccentric structure. However, in the existingpractical applications, some firearm accessories cannot be locked by thelocking device due to too small guide rails or too large guide rails.Meanwhile, the existing locking device is likely to loosen, and this maymake the use of firearms inconvenient and even cause seriousconsequences.

SUMMARY OF THE PRESENT INVENTION

An objective of the present invention is to provide a fast-lockinganti-loosening locking device which can be adjusted to adapt to guiderails of different sizes and which has a function of anti-loosening, inorder to overcome the deficiencies in the prior art.

To achieve the above objective, the present invention employs thefollowing technical solution: a fast-locking anti-loosening lockingdevice is provided, including a body, a pull rod with threads, apressing block and an eccentric handle, wherein the pressing block isdisposed on one side of the body, the pull rod respectively penetratesthrough the pressing blocking and the body, and one end of the pull rodis movably connected to the eccentric handle and the other end of thepull rod penetrates through the body to thread-fit a cap nut; and aspacing between the pressing block and the body is adjusted by rotatingthe cap nut to adapt to guide rails of different sizes.

The cap nut is clamped into a slot on the body by two opposite sides ofa hexagon, and two lateral sides of the slot clamp the cap nut toprevent the cap nut from rotating to loosen after locking.

The pull rod is a pull rod with threads, which facilitates the fittingwith the cap nut.

A protrusion is provided at an end of the eccentric handle connected tothe pull rod, and when in rotation, the protrusion urges the pressingblock to start locking with the body and the cap nut is clamped into theslot on a side face of the body by the two opposite sides of the hexagonto prevent the cap nut from rotating to loosen after locking.

The eccentric handle is provided with a mounting hole into which awrench is movably connected, a spring is mounted between the wrench andthe bottom of the mounting hole, a notch is formed at an end portion ofthe pull rod connected to the eccentric handle, and a tongue extendingand fitting the notch is provided at one end of the wrench.

The wrench is fixed into the mounting hole by passing a pin through thewrench.

The spring is pressed into the mounting hole of the eccentric handle bya spring seat, and the head portion of the spring seat is mounted insidea groove of the wrench. The mounting is convenient and the structure isfirm.

When the eccentric handle is rotated to a position vertical to the pullrod, when the eccentric handle is rotated to be vertical to the pullrod, the tongue will be automatically clamped at the notch of the pullrod under the elasticity, thereby preventing the rotation of theeccentric handle.

The tongue of the wrench is tilted to separate from the notch of thepull rod when the wrench is pressed to the largest extent.

The locking force for locking the pressing block by the eccentric handleis adjustable, the fitting length of the pull rod may be adjusted byrotating the cap nut, and the locking force between the pressing blockand the body may be changed by changing the fitting length.

Compared with the prior art, the present invention has the followingadvantages: the fitting length of the pull rod may be adjusted byrotating the cap nut, and the locking force between the pressing blockand the body may be changed by changing the fitting length. Therefore,the fast-locking anti-loosening locking device of the present inventionmay be adjusted to adapt to guide rails of different sizes and lock thepressing block. Since the cap nut is a hexagon and there is a slotmatched with the hexagon on the body, by clamping the cap nut into theslot, the cap nut is prevented from loosening and the purpose ofanti-loosening is achieved. When the eccentric handle is rotated to aposition vertical to the pull rod, the tongue which is integrated withthe wrench can lock the pressing block and the wrench will beautomatically clamped at the notch of the pull rod with threads underthe elasticity, thereby preventing the eccentric handle from loosening.Even through in the case of firearm firing, the fast-lockinganti-loosening locking device can still maintain a locked state insteadof loosening, thereby ensuring the reliability and practicality of themechanism.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view 1 of a fast-locking anti-loosening lockingdevice according to the present invention;

FIG. 2 is an exploded view 2 of a fast-locking anti-loosening lockingdevice according to the present invention;

FIG. 3 is a sectional view of an eccentric handle component of thefast-locking anti-loosening locking device according to the presentinvention; and

FIG. 4 is a sectional view of the fast-locking anti-loosening lockingdevice according to the present invention in another direction.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

The present invention will be described in details as below withreference to the accompanying drawings by specific embodiments.

A fast-locking anti-loosening locking device, as shown in FIGS. 1-4,includes a body 9, a pull rod 1 with threads, a pressing block 8, a sunkscrew 3, a wrench 2, a cap nut 10, a spring 5, a spring seat 4, a pin 6and an eccentric handle 7. The pressing block 8 is disposed on one sideof the body 9 and fits the body 9 for being clamped and fixed on theguide rails. The pull rod 1 respectively penetrates through the pressingblocking 8 and the body 9, and one end of the pull rod 1 is movablyconnected to the eccentric handle 7 by the sunk screw 3 and the otherend of the pull rod 1 penetrates through the body 9 to thread-fit thecap nut 10. Spacing between the pressing block 8 and the body 9 isadjusted by rotating the cap nut 10 to adapt to guide rails of differentsizes. Meanwhile, the locking force for locking the pressing block 8 bythe eccentric handle 7 may be adjusted. The pull rod 1 is a pull rodwith threads and thread-connected with the cap nut 10 by threads.

Preferably, a protrusion is provided at an end of the eccentric handle 7connected to the pull rod 1, and when in rotation, the protrusion urgesthe pressing block 8 to start locking with the body 9 and the cap nut 10is clamped into the slot on a side face of the body 9 by the twoopposite sides of the hexagon, and two lateral sides of the slot clampthe cap nut 10 to prevent the cap nut from rotating to loosen afterlocking. The slot on a side face of the body 9 can clamp the twoopposite sides of the cap nut 10 to prevent the cap nut from rotating toloosen after locking.

The eccentric handle 7 is provided with a mounting hole into which thewrench 2 is movably connected, the spring 5 is mounted between thewrench 2 and the bottom of the mounting hole, a notch 11 is formed at anend portion of the pull rod 1 connected to the eccentric handle 7, and atongue 12 extending and fitting the notch 11 is provided at one end ofthe wrench 2. When the eccentric handle 7 is rotated to a positionvertical to the pull rod 1, the eccentric handle 7 can lock the pressingblock 8 and the tongue 12 of the wrench 2 will be automatically clampedat the notch 11 under the elasticity, thereby preventing the rotation ofthe eccentric handle 7. The tongue 12 of the wrench 2 will be separatedfrom the notch 11 of the pull rod 1 when the wrench 2 is pressed to thelargest extent. At this moment, the eccentric handle 7 may be rotatedoutward and the pressing block 8 and the body 9 may be loosened. Theoperation is very simple, and the present invention is reliable anddurable. The wrench 2 and the tongue 12 are integrated, so that thestructure is simple and reliable and the mounting is easy. The wrench 2is fixed into the mounting hole by passing the pin 13 through the wrench2. The spring 5 is pressed into the mounting hole of the eccentrichandle 7 by a spring seat 4, and the head portion of the spring seat 4is mounted inside a groove of the wrench 2. The tongue 12 is clamped atthe notch of the pull rod 1 under the elasticity, to prevent therotation of the handle. The spring 5 is arranged upward so that thetongue of the wrench clamps the notch 11. The number of overall parts issmall and the assembly is convenient.

Although the present invention has been described with reference to thespecific embodiments, this description is not intended to limit thepresent invention. Referring to the description of the presentinvention, other variations of the disclosed embodiment are expected bythose skilled in the art, and those variations fall into the scopedefined by the appended claims.

What is claimed is:
 1. A fast-locking anti-loosening locking device,comprising a body, a pull rod with threads, a pressing block and aneccentric handle, wherein the pressing block is disposed on one side ofthe body, the pull rod respectively penetrates through the pressingblocking and the body, and one end of the pull rod is movably connectedto the eccentric handle and the other end of the pull rod penetratesthrough the body to thread-fit a cap nut.
 2. The fast-lockinganti-loosening locking device according to claim 1, wherein the cap nutis clamped into a slot on the body by two opposite sides of a hexagon,and two lateral sides of the slot clamp the cap nut.
 3. The fast-lockinganti-loosening locking device according to claim 1, wherein the pull rodis a pull rod with threads.
 4. The fast-locking anti-loosening lockingdevice according to claim 3, wherein a protrusion is provided at an endof the eccentric handle connected to the pull rod, and when in rotation,the protrusion urges the pressing block to start locking with the bodyand the cap nut is clamped into the slot on a side face of the body bythe two opposite sides of the hexagon.
 5. The fast-lockinganti-loosening locking device according to claim 1, wherein theeccentric handle is provided with a mounting hole into which a wrench ismovably connected, a spring is mounted between the wrench and the bottomof the mounting hole, a notch is formed at an end portion of the pullrod connected to the eccentric handle, and a tongue extending andfitting the notch is provided at one end of the wrench.
 6. Thefast-locking anti-loosening locking device according to claim 5, whereinthe wrench is fixed into the mounting hole by passing a pin through thewrench.
 7. The fast-locking anti-loosening locking device according toclaim 5, wherein the spring is pressed into the mounting hole of theeccentric handle by a spring seat, and the head portion of the springseat is mounted inside a groove of the wrench.
 8. The fast-lockinganti-loosening locking device according to claim 5, when the eccentrichandle is rotated to a position vertical to the pull rod, when theeccentric handle is rotated to be vertical to the pull rod, the tonguewill be automatically clamped at the notch of the pull rod under theelasticity.
 9. The fast-locking anti-loosening locking device accordingto claim 5, wherein the tongue of the wrench is tilted to separate fromthe notch of the pull rod when the wrench is pressed to the largestextent.